CN216950804U - Main pump seal test system - Google Patents

Abstract

The utility model relates to a main pump sealing test system which comprises a water tank, a driving assembly, a plunger pump, an energy accumulator and an injection port one-way valve. One end of the plunger pump is connected with the water tank, the other end of the plunger pump is connected with the mechanical seal, and the plunger pump can pump water in the water tank into the mechanical seal under the driving of the driving assembly; the energy accumulator is connected with the plunger pump; one end of the filling port one-way valve is connected with the water tank, the other end of the filling port one-way valve is connected with the mechanical seal, and the filling port one-way valve is connected with the energy accumulator; when the driving assembly stops outputting power to the plunger pump, the injection port one-way valve can be opened under the pushing of the energy accumulator and pumps the water in the water tank into the mechanically sealed sealing cavity. When meeting power failure suddenly or drive assembly damages in the testing process, the energy storage ware promotes the filling opening check valve and opens this moment for in the water tank flows into mechanical seal through the filling opening check valve, and then makes the velocity of flow of the water in the entire system slowly stop, the effectual whole test system and mechanical seal of having protected.

Description

Main pump seal test system

Technical Field

The utility model relates to the technical field of sealing test, in particular to a main pump sealing test system.

Background

The mechanical seal in the nuclear main pump component is a very critical component, which can ensure that the leakage amount of the reactor coolant from the main pump axial containment space environment during the long-term normal operation of the power plant is basically zero. However, since the mechanical sealing structure is complicated, has many parts and is vulnerable, the supply period is long and the price is expensive, so that it is necessary to renew and reuse the replaced mechanical sealing structure. When a replaced mechanical seal is refurbished, the performance of the refurbished seal needs to be detected to detect whether the machine meets the reuse standard. In order to make the detection result more accurate, the detection time of the mechanical seal is generally longer. However, in the prior art, the mechanical seal may encounter an abnormal situation such as sudden power failure or damage of a driving component during a long-time test, so that the flow rate of water in the whole test system may suddenly change, and the test system and the mechanical seal are very easy to damage.

SUMMERY OF THE UTILITY MODEL

Therefore, the main pump seal testing system is needed to solve the technical problem that when mechanical seals are tested for a long time and abnormal conditions such as accidental power failure or damage of a driving assembly occur, the flow speed of water flow of the whole testing system changes suddenly, and the testing system and the mechanical seals are prone to damage.

A main pump seal testing system, comprising: a water tank; a drive assembly; one end of the plunger pump is connected with the water tank, the other end of the plunger pump is used for being connected with a mechanical seal, and the plunger pump is connected with the driving assembly; the plunger pump can pump water in the water tank into the sealing cavity of the mechanical seal under the driving of the driving assembly; the energy accumulator is connected with the plunger pump; one end of the injection port one-way valve is connected with the water tank, the other end of the injection port one-way valve is connected with the mechanical seal, and the injection port one-way valve is connected with the energy accumulator; when the driving assembly stops outputting power to the plunger pump, the injection port one-way valve can be opened under the pushing of the energy accumulator and pumps the water in the water tank into the mechanical sealed sealing cavity.

In one embodiment, a heating tank is arranged in the water tank, water in the water tank can flow into the heating tank and perform heating operation, and the heating tank is connected with the plunger pump.

In one embodiment, a heating tank safety valve is further arranged in the water tank, the heating tank safety valve is installed between the heating tank and the plunger pump, and the heating tank safety valve is communicated with an atmosphere outlet.

In one embodiment, the plunger pump further comprises a pump outlet relief valve mounted between the plunger pump and the mechanical seal.

In one embodiment, the water tank cooling device further comprises a refrigeration assembly, one end of the refrigeration assembly is connected with the water tank, the other end of the refrigeration assembly is connected with the plunger pump, and the refrigeration assembly can cool water in the water tank.

In one embodiment, the water tank further comprises a water filling port one-way valve, one end of the water filling port one-way valve is used for being connected with an external water source pipeline, the other end of the water filling port one-way valve is connected with the water tank, and the water filling port one-way valve can control an external water source to enter the water tank.

In one embodiment, the device further comprises a gas injection port one-way valve, one end of the gas injection port one-way valve is used for being connected with an external nitrogen pipeline, the other end of the gas injection port one-way valve is connected with the water tank, and the gas injection port one-way valve can control external nitrogen to be introduced into the water tank.

In one embodiment, the device further comprises a leakage water safety valve, one end of the leakage water safety valve is connected with the mechanical seal, and the other end of the leakage water safety valve is used for being connected with a drainage pipeline.

In one embodiment, the device further comprises a transmission assembly, wherein the transmission assembly comprises a transmission shaft and a driving piece; the transmission shaft is fixedly connected with the mechanical seal, the transmission shaft is connected with the power output end of the driving piece, and the transmission shaft can drive the mechanical seal to rotate around the transmission shaft under the driving of the driving piece.

In one embodiment, the intelligent control system further comprises a DCS control cabinet, wherein the DCS control cabinet is electrically connected with the driving assembly and can control the on-off of the driving assembly; and the DCS control cabinet is connected with the plunger pump, and can control the rotation of the plunger pump.

The utility model has the beneficial effects that:

according to the main pump seal testing system provided by the utility model, when the sealing performance of the mechanical seal of the refurbished nuclear main pump is detected by the seal testing system, the energy accumulator is connected with the plunger pump, so that when the plunger pump rotates under a normal working condition and pumps water in the water tank into the seal cavity of the mechanical seal, the energy accumulator can store a part of the rotation energy of the plunger pump. When meeting power failure suddenly or the plunger pump damages at the testing process, the energy storage ware can promote the filling opening check valve and open this moment for in the water tank flows into mechanical seal through the filling opening check valve, and then makes the velocity of flow of the water in the entire system can slowly stop, the effectual whole test system and mechanical seal of having protected.

Drawings

Fig. 1 is a schematic diagram of a main pump seal testing system according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a mechanical seal detected by the main pump seal testing system shown in fig. 1.

Reference numerals: 10-mechanical sealing; 11-first sealing; 12-sealing No. two; no. 13-third sealing; 21-a drive member; 22-a main synchronizing wheel; 23-a synchronous belt; 24-a slave synchronizing wheel; 25-a drive shaft; 26-mounting the frame.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1, fig. 1 is a schematic diagram illustrating a main pump seal testing system according to an embodiment of the present invention, which includes a water tank, a driving assembly, a plunger pump, an accumulator, and a fill port check valve. One end of the plunger pump is connected with the water tank, the other end of the plunger pump is used for being connected with the mechanical seal 10, and the plunger pump is connected with the driving assembly; the plunger pump can pump water in the water tank into the sealing cavity of the mechanical seal 10 under the driving of the driving assembly; the energy accumulator is connected with the plunger pump; one end of the filling port one-way valve is connected with the water tank, the other end of the filling port one-way valve is connected with the mechanical seal 10, and the filling port one-way valve is connected with the energy accumulator; when the driving assembly stops outputting power to the plunger pump, the injection port one-way valve can be opened under the pushing of the energy accumulator and pump the water in the water tank into the sealing cavity of the mechanical seal 10.

When the sealing performance of the mechanical seal 10 of the refurbished nuclear main pump is detected through the main pump seal testing system, the energy accumulator is connected with the plunger pump, so that when the plunger pump rotates under normal working conditions and pumps water in the water tank into a seal cavity of the mechanical seal 10, the energy accumulator can store part of the rotation energy of the plunger pump. When meeting power failure suddenly or the plunger pump damages in the testing process, the energy storage ware can promote the filling opening check valve and open this moment for in the water tank flows into mechanical seal 10 through the filling opening check valve, and then makes the velocity of flow of the water in the entire system can slowly stop, has effectually protected whole test system and mechanical seal 10.

In one specific embodiment, the drive assembly includes a high voltage control cabinet, an external high voltage interface, and a motor. The forceful electric power switch board links to each other with outside forceful electric power interface and motor, and the forceful electric power switch board links to each other with water tank and plunger pump. The forceful electric power switch board passes through the forceful electric power that outside forceful electric power interface carried and turns into drive signal and carry feed tank and plunger pump, and then comes the heating condition of control water tank and the rotation condition of plunger pump for water tank and plunger pump are convenient for control and maintenance. When the water tank and the plunger pump deviate from the normal working state, corresponding maintenance signals can be prompted or sent. Specifically, the strong current control system comprises a frequency converter, a power protection switch, a relay, a power converter and a silicon controlled rectifier. In one specific embodiment, the strong current is 380V.

In some embodiments, the accumulator is a gas accumulator, and the storage and release of energy is accomplished by a change in compression of the gas within it. In one specific embodiment, the accumulator is a 40L high temperature and high pressure gas accumulator. Of course, in other embodiments, the accumulator may be a spring-type accumulator or a piston-type accumulator.

It should be noted that, the water adopted by the main pump seal test system is demineralized water, which can effectively avoid the corrosion effect of the saline substances in the water on the cavity wall of the mechanical seal 10. Of course, in other embodiments, the test system may also select a sealing test for oil or other media, which is not limited herein.

The following is a detailed description of the structure of the main pump seal test system. Referring to fig. 1, a heating tank is disposed in a water tank of a main pump seal testing system according to an embodiment of the present invention, water in the water tank can flow into the heating tank and perform a heating operation, and the heating tank is connected to a plunger pump. The water in the water tank is heated through the heating tank, so that the water pumped by the mechanical seal 10 can be in a higher temperature range, and the sealing performance of the mechanical seal 10 at a higher temperature can be detected.

Referring to fig. 1, a heating tank safety valve is further disposed in a water tank of a main pump seal testing system according to an embodiment of the present invention, the heating tank safety valve is installed between a heating tank and a plunger pump, and the heating tank safety valve is communicated with an atmosphere outlet. When the water in the heating tank is too much or the air pressure is too large, the safety valve of the heating tank can automatically discharge the water or the gas in the heating tank to the outside of the atmosphere outlet, so that the heating tank is safer in use.

Referring to fig. 1, a main pump seal testing system according to an embodiment of the present invention further includes a heating pipe top safety valve, one end of the heating pipe top safety valve is connected to the water tank, and the other end of the heating pipe top safety valve is communicated with an atmosphere outlet. The water in the heating tank is heated through the heating pipe, the temperature of the heating pipe can be monitored by arranging the safety valve at the top of the heating pipe, and when the temperature of the heating pipe is abnormally too high, the safety valve at the top of the heating pipe is opened and communicated with the atmosphere outlet, so that the temperature of the heating pipe can be rapidly reduced, and the use safety of the heating pipe is ensured.

Referring to fig. 1, the main pump seal testing system according to an embodiment of the present invention further includes a heat exchanger, the heat exchanger is connected to the water tank, and heat generated by heating the heating tank in the water tank can be replaced to the outside through the heat exchanger, so as to ensure that a circuit of the water tank is at a relatively constant temperature. In one specific embodiment, the heat exchanger is made of metal, and the circuit in the water tank is cooled through the heat conduction performance of the metal.

Referring to fig. 1, the system for testing the sealing performance of the main pump according to an embodiment of the present invention further includes a condenser, the condenser is connected to the water tank, the condenser is capable of discharging heat generated by heating the heating tank in the water tank to the condensate collecting tank through liquefaction, and regular discharge processing is performed periodically to ensure that a circuit of the water tank is at a relatively constant temperature.

Referring to fig. 1, a main pump seal testing system according to an embodiment of the present invention further includes a pump outlet safety valve, and the pump outlet safety valve is installed between the plunger pump and the mechanical seal 10. Through setting up pump outlet relief valve for water pressure between plunger pump and mechanical seal 10 can be controlled at certain within range, and then makes whole main pump seal test system safer.

Referring to fig. 1, a system for testing a seal of a main pump according to an embodiment of the present invention further includes a pump heat exchanger, and the pump heat exchanger is connected to the plunger pump. When the pump is rotating the in-process, can produce the heat, the heat that will rotate the production through pump heat exchanger this moment brings to the external world for the temperature of the rotation motor in the pump is lower, avoids the rotation motor to appear burning out the machine condition under the higher temperature.

Referring to fig. 1, the main pump seal testing system according to an embodiment of the present invention further includes a refrigeration assembly, one end of the refrigeration assembly is connected to the water tank, the other end of the refrigeration assembly is connected to the plunger pump, and the refrigeration assembly is capable of cooling water in the water tank. Through the refrigeration effect of the refrigeration assembly, water in the water tank flows into the plunger pump after being cooled to a certain temperature, and is pumped into the mechanical seal 10 through the plunger pump, so that the sealing performance of the mechanical seal 10 at a lower temperature can be detected.

In one specific embodiment, the refrigeration assembly comprises a refrigerator, a pump head cooling heat exchanger, a pump head cooling forced circulation pipeline pump, a medium cooling heat exchanger, a temperature sensor, a safety valve and the like. Wherein, the refrigerator as the main cold source device includes: the system comprises a refrigeration compressor, a PLC control system, an alternating current contactor, a thermal relay, a filter, a liquid viewing mirror, an electronic expansion valve, an evaporator, a condenser, an angle valve, a flow switch, a circulating water pump and a stainless steel water tank.

The design of the refrigerator has the following features. Specifically, the inside of the refrigerator adopts a stainless steel coil high-efficiency heat exchanger, so that the structure is compact, the volume is small and the weight is light; the equivalent diameter is small, the flow disturbance is large, and therefore the heat transfer coefficient is higher; the refrigerant charging amount is small; the smallest space achieves the largest amount of heat exchange. The PLC control system has the following working mode selection: automatic and operation panel mode switching. The system has an independent humanized operation interface and a fault self-diagnosis function: all fault points have adjustable time detection delay, such as common fault detection delay and flow switch detection delay, so as to prevent the fluctuation of the protection switch. And when the flow switch and the phase-missing protection are carried out, the system is completely stopped, namely, the circulating water pump, the refrigeration compressor, various valves and other equipment are completely stopped.

Referring to fig. 1, a main pump seal testing system according to an embodiment of the present invention further includes a water inlet check valve, one end of the water inlet check valve is used for being connected to an external water source pipeline, the other end of the water inlet check valve is connected to a water tank, and the water inlet check valve can control an external water source to enter the water tank. Owing to be provided with the water filling port check valve, therefore in the water of water tank can not palirrhea to outside water source pipeline, avoid the water in the water tank to pollute outside water source, also can make the water tank form a closed loop system relatively with plunger pump and mechanical seal 10 simultaneously, entire system is difficult for receiving the influence at outside water source.

Referring to fig. 1, the main pump seal testing system according to an embodiment of the present invention further includes a gas injection port check valve, one end of the gas injection port check valve is used for being connected to an external nitrogen pipeline, and the other end of the gas injection port check valve is connected to the water tank, and the gas injection port check valve can control external nitrogen to be introduced into the water tank. Through setting up the gas injection mouth check valve for in outside nitrogen gas can get into the water tank, and then make the sealed test system of whole main pump can keep under certain atmospheric pressure condition, the difficult cavitation phenomenon that appears of plunger pump, the safety and stability more of entire system. Meanwhile, nitrogen is inert gas, so that chemical reaction is not easy to occur with the cavity wall of the mechanical seal 10 and the cavity wall of the water tank even under a long-time test condition, and damage to the cavity wall is reduced.

In one specific embodiment, the test system further comprises a pneumatic pressure regulating valve, the pneumatic pressure regulating valve is connected with the gas injection port one-way valve, when the pneumatic pressure regulating valve detects that the gas pressure is outside a rated range, the gas pressure in the water tank is regulated by controlling the on-off of the gas injection port one-way valve, and therefore the gas pressure of the whole test system is within a certain range.

Referring to fig. 1, the main pump seal testing system according to an embodiment of the present invention further includes a water leakage safety valve, one end of the water leakage safety valve is connected to the mechanical seal 10, and the other end of the water leakage safety valve is used for being connected to a trench discharge pipeline. When the pressure value of the sealing cavity in the mechanical seal 10 exceeds a certain numerical value, the water leakage safety valve can be opened and discharge the gas and water in the sealing cavity, so that the dangerous condition of the mechanical seal 10 caused by overlarge pressure is avoided. At the same time, the water flowing out of the water leakage safety valve may be collected and the substance components thereof may be detected, and the state of the internal substance of the mechanical seal 10, for example, the amount of rust may be estimated.

Referring to fig. 2, fig. 2 is a schematic diagram illustrating a mechanical seal 10 detected by the main pump seal testing system shown in fig. 1, wherein the main pump seal testing system according to an embodiment of the present invention further includes a transmission assembly, the transmission assembly includes a transmission shaft 25 and a driving member 21; the transmission shaft 25 is fixedly connected with the mechanical seal 10, the transmission shaft 25 is connected with the power output end of the driving part 21, and the transmission shaft 25 can drive the mechanical seal 10 to rotate around itself under the driving of the driving part 21. The driving piece 21 drives the transmission shaft 25 to rotate, so that the mechanical seal 10 can rotate around the axis of the transmission shaft 25, and the main pump seal testing system can test the sealing performance of the mechanical seal 10 under the rotation condition. In one specific embodiment, the driving member 21 is an electric motor, but in other embodiments, the driving member 21 may be a rotary cylinder.

In one particular embodiment, the drive assembly further includes a master timing wheel 22, a slave timing wheel 24, and a timing belt 23. The main synchronizing wheel 22 is sleeved with a power output end fixed on the motor, the auxiliary synchronizing wheel 24 is sleeved with a power output end fixed on the transmission shaft 25, the synchronous belt 23 is tensioned through the main synchronizing wheel 22 and the auxiliary synchronizing wheel 24 and can perform closed annular motion under the driving of the main synchronizing wheel 22 and the auxiliary synchronizing wheel 24, and then the transmission shaft 25 is driven to rotate around the axis of the transmission shaft. The transmission ratio of the whole transmission process is large and the transmission is stable. In one embodiment, the slave synchronizing wheel 24 is a conical wheel to facilitate disassembly and assembly.

Referring to fig. 2, the main pump seal testing system according to an embodiment of the present invention further includes a mounting frame 26. The mechanical seal 10 to be tested is mounted on the mounting frame 26. The mounting frame 26 is provided with a damping material, so that the influence of external vibration on the detection result is avoided, and the detection result is more accurate.

Referring to fig. 2, a mechanical seal 10 detected by a main pump seal testing system according to an embodiment of the present invention includes a first seal 11, a second seal 12, and a third seal 13. A first seal 11 is located on the inner side of the first-stage seal cavity, a second seal 12 is located on the inner side of the second-stage seal cavity, and a third seal 13 is located between the second-stage seal cavity and the protection cavity. The second seal 12 and the third seal 13 are a communicated whole; the whole formed by the second seal 12 and the third seal 13 is selectively communicated with the first seal 11. The first seal 11 is connected with the water tank and the plunger pump, so that the independent detection experiment can be carried out on the sealed cavity of the first seal 11. The second seal 12 and the third seal 13 are connected with the water tank and the plunger pump, and when the whole formed by the second seal 12 and the third seal 13 is selectively separated from the first seal 11, a seal cavity formed by the second seal 12 and the third seal 13 can be independently detected; and when the whole formed by the second seal 12 and the third seal 13 is selectively communicated with the first seal 1, the whole of the first seal 11, the second seal 12 and the third seal 13 can be subjected to set detection.

Referring to fig. 1, the main pump seal testing system provided in an embodiment of the present invention further includes a DCS control cabinet, which is electrically connected to the driving assembly, and is capable of controlling the on/off of the driving assembly; and the DCS control cabinet is connected with the plunger pump, and the DCS control cabinet can control the rotation of the plunger pump. Wherein, DCS is a distributed control system. The make-and-break of drive assembly and the rotation of plunger pump are controlled through the DCS switch board, can avoid when the plunger pump breaks down and blocks, and drive assembly continues the further damage that the institute caused to the plunger pump of supplying power. The control of the whole main pump sealing test system is more reliable and safer through the centralized management and distributed control of the DCS control cabinet.

Referring to fig. 1, in one embodiment, the DCS control cabinet is further connected to the water tank, and is capable of monitoring a change in air pressure in the water tank, and further selectively opening or closing the check valve of the gas injection port; meanwhile, the water level height in the water tank can be monitored, and then the one-way valve of the water filling port is selectively opened or closed.

Referring to fig. 1, in one embodiment, the DCS control cabinet is further connected to the mechanical seal 10 and the disk station, and forms a closed loop with the mechanical seal 10 and the disk station. The tray station is provided with a plurality of meters for displaying internal parameters of the seal cavity of the mechanical seal 10, such as a thermometer, a pressure gauge, a flow rate, a vibration amplitude and the like. Thereby enabling the inspector to view the internal parameter variations of the sealed cavity of the mechanical seal 10 in real time. In one particular embodiment, an industrial transmitter is included that is coupled to mechanical seal 10 and the tray. The parameter variation inside the mechanical seal 10 is converted into the display parameter of the instrument on the disc station by the industrial transmitter.

Referring to fig. 1, a main pump seal testing system according to an embodiment of the present invention adopts a safety redundancy design, and includes a UPS controller and a UPS battery, where the UPS controller is connected to the UPS battery, the UPS controller and the UPS battery are further connected to a power control cabinet and a DCS control cabinet, the UPS power is an uninterruptible power supply, and the UPS controller is a controller of the uninterruptible power supply. Through setting up UPS controller and UPS power for this main pump seal test system also can continue work a period under the support of UPS power when having a power failure, can reserve certain time of handling unusual operating mode for the detector, and then can fall to the harm of proruption situation such as having a power failure to minimum.

In one specific embodiment, the DCS control cabinet includes 2 operation stations (one of the facultative engineer stations), 1 DCS system I \0 cabinet, and 1 touch screen is provided. The DCS control cabinet also comprises a field I/O control station, a pair of high-performance and large-capacity redundant main control units are configured, a reliable real-time control network is formed between the redundant 100M industrial Ethernet and the operation station, each main control unit is provided with a backup large-capacity lithium battery, and each clamping piece in each field I/O station is independent 1: 1 redundant power supply, which is supplied by 220V and UPS. The operator can complete the operations of picture switching, alarm display, various display windows popping and the like through the keyboard and the optical mouse.

In one specific embodiment, the DCS control cabinet further includes a control station (the main control unit, the power supply, and the network are all redundant in 1: 1) which is a large-scale I/O processing system directly connected to the production line site, and has functions of signal acquisition of parameters, loop regulation, logic interlocking, sequential control, and local operation. The engineer station mainly completes the functions of off-line configuration and management of equipment, a database, graphs, control algorithms, reports and system parameters, off-line simulation, system initial downloading, system control parameter self-checking, alarm fault inquiry, operation parameter summarization of the whole production line, state information display, class and day report processing, event random printing, control trend analysis, control scheme optimization and the like.

It should be noted that the main pump seal test system also has a self-encryption database (storing unchangeable original data), and the database has a universal data interface, and can directly derive test data and working condition parameters. The file format for data export can be data which can be read by general engineering software such as Excel, matlab, labview and the like. And the whole system has the reliability characteristics: power redundancy, system network redundancy, main control communication unit redundancy, live replacement module, fault self-diagnosis and control loop redundancy.

The main pump seal testing system provided by the embodiment of the utility model also comprises a mounting working platform, and the main pump seal testing system is mounted on the working platform, is convenient for personnel to operate, can be distinguished from other structures, and has a certain protection function. The surface of the whole working platform structure has no sharp corner, and the surface is smooth and flat. And the integration level of the pipeline system and the platform module is high, most of the pipeline system and the platform module are arranged in a concealed pipe, the appearance is neat and tidy, and the pipeline system is convenient to seal, assemble, disassemble and operate by personnel.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A main pump seal test system, comprising:

a water tank;

a drive assembly;

one end of the plunger pump is connected with the water tank, the other end of the plunger pump is used for being connected with a mechanical seal (10), and the plunger pump is connected with the driving assembly; the plunger pump can pump water in the water tank into a sealing cavity of the mechanical seal (10) under the driving of the driving assembly;

the energy accumulator is connected with the plunger pump;

one end of the injection port one-way valve is connected with the water tank, the other end of the injection port one-way valve is connected with the mechanical seal (10), and the injection port one-way valve is connected with the energy accumulator; when the driving assembly stops outputting power to the plunger pump, the injection port one-way valve can be opened under the pushing of the energy accumulator and pumps the water in the water tank into a sealing cavity of the mechanical seal (10).

2. The main pump seal testing system of claim 1, wherein a heating tank is provided in said water tank, water in said water tank being able to flow into said heating tank and perform a heating operation, said heating tank being connected to said plunger pump.

3. The primary pump seal testing system of claim 2, further provided within said water tank is a heating tank relief valve mounted between said heating tank and said plunger pump, and said heating tank relief valve is in communication with an atmospheric outlet.

4. The main pump seal testing system of claim 1, further comprising a pump outlet relief valve mounted between said plunger pump and said mechanical seal (10).

5. The main pump seal testing system of claim 1, further comprising a refrigeration assembly, one end of the refrigeration assembly being connected to the water tank, the other end of the refrigeration assembly being connected to the plunger pump, the refrigeration assembly being capable of cooling water within the water tank.

6. The main pump seal testing system of claim 1, further comprising a fill port check valve, one end of the fill port check valve being configured to be connected to an external water source line, the other end of the fill port check valve being connected to the water tank, the fill port check valve being configured to control an external water source to enter the water tank.

7. The main pump seal testing system of claim 1, further comprising a gas injection port check valve having one end for connection to an external nitrogen gas line and another end connected to the water tank, the gas injection port check valve capable of controlling the passage of external nitrogen gas into the water tank.

8. The main pump seal testing system of claim 1, further comprising a leakage water safety valve having one end connected to the mechanical seal (10) and another end for connection to a drain line.

9. The primary pump seal testing system of claim 1, further comprising a transmission assembly including a drive shaft (25) and a drive member (21); the transmission shaft (25) is fixedly connected with the mechanical seal (10), the transmission shaft (25) is connected with the power output end of the driving piece (21), and the transmission shaft (25) can drive the mechanical seal (10) to rotate around the transmission shaft under the driving of the driving piece (21).

10. The main pump seal testing system of any one of claims 1-9, further comprising a DCS control cabinet, said DCS control cabinet being electrically connected to said drive assembly, said DCS control cabinet being capable of controlling the switching on and off of said drive assembly; and the DCS control cabinet is connected with the plunger pump, and can control the rotation of the plunger pump.

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